答案1
这可以用 Tikz 来实现。如果你想学习 Tikz,我建议你阅读手动的。里面有很多很好的例子。
\documentclass[tikz,border=2pt]{standalone}
\begin{document}
\begin{tikzpicture}[->]
\node (a) at (90:2cm) {Democrat};
\node (b) at (-30:2cm) {Republician};
\node (c) at (210:2cm) {Third};
\draw (-20:2cm) arc (-20:60:2cm) node[midway, right] {{\footnotesize 5 voters}};
\draw (120:2cm) arc (120:200:2cm) node[midway, left] {{\footnotesize 7 voters}};
\draw (220:2cm) arc (220:320:2cm) node[midway, below] {{\footnotesize 1 voter}};
\end{tikzpicture}
\end{document}
如果您想在文档中使用它,请确保将其添加\usepackage{tikz}
到序言中。